http://bugs.winehq.org/show_bug.cgi?id=20334
--- Comment #3 from Nikolay Sivov bunglehead@gmail.com 2009-10-12 09:07:40 --- Hi, thanks for report.
Could you provide a test diff for Wine test suite (oleaut32/tests/vartype.c)? It's too complicated now, all you need to check is does it add null terminator and how it depends on previous string length.